Internal thoracic vein

In human anatomy, the internal thoracic vein (previously known as the internal mammary vein) is the vein that drains the chest wall and breasts.^[1]

Internal thoracic vein
Veins of the thorax and abdomen. The internal thoracic veins drain into the brachiocephalic veins.]
Posterior surface of sternum and costal cartilages, showing Transversus thoracis. (Internal mammary vessels labeled at center top.)
Details
Drains from	Superior epigastric vein
Drains to	Brachiocephalic vein
Artery	Internal thoracic artery
Identifiers
Latin	vena thoracica interna
TA98	A12.3.04.018
TA2	4786
FMA	4729
Anatomical terminology [edit on Wikidata]

Structure

Bilaterally, the internal thoracic vein arises from the superior epigastric vein, and accompanies the internal thoracic artery along its course.^[1] It drains the intercostal veins, although the posterior drainage is often handled by the azygous veins.^[1] It terminates in the brachiocephalic vein.^[2] It has a width of 2-3 mm.^[3]

There is either one or two internal thoracic veins accompanying the corresponding artery (internal thoracic artery). If internal thoracic vein is single, it usually runs medial to the artery. If there are double thoracic veins, they run on either side of the internal thoracic artery.^[4]

Variations

Bifurcation of each internal thoracic vein is common. The left internal thoracic vein may bifurcate between ribs 3-4 or remain as a single vein.^[5] The right internal thoracic vein may bifurcate between ribs 2-4 or remain as a single vein.^[5]

Function

The internal thoracic vein drains the chest wall and the breasts.^[1]

Clinical significance

Knowledge on the course of internal thoracic vein and artery is important during interventional procedures through the anterior chest wall such as biopsy and empyema drainage. This is to avoid puncturing the vessels and cause massive bleeding.^[6]

Accidental placement of central venous catheter in the internal thoracic vein can cause pleural effusions, chest wall abscess, pulmonary edema, shortness of breath and chest pain.^[6]

Other animals

Internal thoracic vein runs just lateral to the sternum.^[7]

The internal thoracic vein can act as a collateral circulation for blood from the inferior vena cava to the superior vena cava.^[7] This can work in either direction.^[7] It may partially compensate for disturbances to blood flow.^[7]

Additional images

• 
  Transverse section of thorax, showing relations of pulmonary artery.

References

1. Drake, Richard L.; Vogl, Wayne; Mitchell, Adam W. M.; Gray, Henry (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. ISBN 0-443-06612-4. OCLC 55139039.
2. Mozes, GEZA; Gloviczki, PETER (2007), Bergan, John J. (ed.), "CHAPTER 2 - Venous Embryology and Anatomy", The Vein Book, Burlington: Academic Press, pp. 15–25, doi:10.1016/b978-012369515-4/50005-3, ISBN 978-0-12-369515-4
3. Stewart, Charles E.; Urken, Mark L. (2009), Wei, Fu-Chan; Mardini, Samir (eds.), "CHAPTER 18 - Deltopectoral flap", Flaps and Reconstructive Surgery, Edinburgh: W.B. Saunders, pp. 193–205, doi:10.1016/b978-0-7216-0519-7.00018-6, ISBN 978-0-7216-0519-7
4. Jelicić N, Djordjević L, Stosić T (1996). "Unutrasnji grudni krvni sudovi (a. et vv. thoracicae internae) i njihov prakticni znacaj" [The internal thoracic blood vessels (internal thoracic arteries and veins) and their practical significance]. Srpski Arhiv Za Celokupno Lekarstvo (in Serbian). 124 (3–4): 58–61. PMID 9102819.
5. Singh G, Jayadev Magani SK, Sharma R, Bhat B, Shrivastava A, Chinthakindi M, Singh A (2019). "Structural, functional and molecular dynamics analysis of cathepsin B gene SNPs associated with tropical calcific pancreatitis, a rare disease of tropics". PeerJ. 7. e7425. doi:10.7717/peerj.7425. PMC 6778667. PMID 31592339. "Table 1: The Single Nucleotide Polymorphisms in cathepsin B protein mined from literature (PMID: 16492714)". PeerJ. doi:10.7717/peerj.7425/table-1.
6. Vollala, Venkata Ramana; Pamidi, Narendra; Potu, Bhagath Kumar (March 2008). "Internal thoracic vein draining into the extrapericardial part of the superior vena cava: a case report". Jornal Vascular Brasileiro. 7 (1): 80–83. doi:10.1590/S1677-54492008000100015. ISSN 1677-5449.
7. Ricciardi, Mario; Casali, Alice (September 2020). "Internal thoracic veins: Anatomy, plasticity and clinico-imaging relevance in small animal practice". The Journal of Veterinary Medical Science. 82 (9): 1358–1365. doi:10.1292/jvms.20-0064. ISSN 0916-7250. PMC 7538324. PMID 32713890.

External links

• Internal thoracic vein - thefreedictionary.com